Vintage Virginia Apples is close to your region and lists eight different crabs. Don't know if they still sell them, since the page seems to have been last updated in 2009.
Also, it is not widely known that a "crabapple" is not a subspecies of apple, but just any apple variety that produces a larger number of smaller fruits. They can have the same range of flavors as full-size apples. I'm growing a Centennial and a Chestnut, but haven't had any fruit yet.